Bolt-anchor.



BOLT ANCHOR. nrmon'lpn rmm In.. 11, 108.859.

1913. BEHBVWED JULY 37.

Patented Aug.25,1914

2mg. y

Snowdon DMBemfir attentat? erw-i f 's is. l isili erinnern' or sosinnron, rnnnissnvin Eatkenited' nigg., i225? @.@Mh Renewed 311137 2'?, 191e. Serial his; S'fi?.

Specification ofettex's atent.

7 oit the nited Sintes,4 residing cinertoin in the coontjv of Phiisdelphie oi" lennsylvenis, have invented win new and 'useful improvements in o be e full, clear, exact description e invention, such :is will ensbie others in the srt to which it epperteins yto i use the sanne. f f nis invention relates to improvements in e obiech of the invention is to provide hon., anchor for concrete iioors,' ceilings, A Ae like having ineens whereby the 'i secured to the bese or freine on Le concrete \is leidV and which is c e plurality ci, sections therehy ren unecost ofessting the seine.

ther ohiect is to provide s bolt anchor .g adjustable casing members whereby icioL in the 'concrete through which the with and removed romthe ier is iorined and lrept open.

rrr-ther object is to provide a device .of which will be simple, strong, sind inexpensive in construction, and reiiable in operation and well iY `'Tith these end other objects in View, the enticnooiisists of certain novel features construction, and the combination and .rsngenient of parts es will be more fully cijoeci end claimed.

theeccompsnying drawings: Figure 1 is' sectional view through s. concrete floor showing in v improved bolt anchor applied thevioor; Fig. 4: is e top plan view of the with the boit casing removed; Fig.

e siniiier view teken on the line 6-6 of Fic.

g 5" i' llt casing or lining for formed. in the concrete .shove the anchor..

f improved bolt anchor comprises s f portion i formed. in two se TX Y i' ist nimeer Winsen Anchors; end declare' the ioliovw` .ed lto the purpose for which it is de' thereto end in side eleve-tion; Fig. 2 is eA is ho "isontel sectional view of the anchor c on line ci Fig.. 1; Fig. 6 is' is' s' detail 'perspective view ci the the bolt hole which cyiindricel sections 2 and Sfwhich ere loro vided on. their inner' snr-feces with holt' v continuons spiral rih extending irom'the inner or upper end anchor to the lower end thereof. On the, lower end oit' the sec-y oi the anchor formed series cui re".

dislly projecting bese. ings which ere en with .the yoists or bers ci? the frente@ work en which the 'concrete materiei is sid i wiii henoted that two of the ings erel vided5 one-heli of each .lug formed on each section, seid half lugs being; brought together when the sections ere assembled, Theengsgement of' the staples 7 with. the heli' sections'of the lugs serves to fasten these. ings and the lower end of the sections together. @n the sections of the anchor neer their upper ends are aisoforxned radially. projecting anchoring lugs 8 which are con# structed similarly to the base lnggs but ere ot" less length than thel letter. 'in the upper ends of the sections of the Lenchor are formed seini-circulsr recesses 9 whichwhen the sections are brought together form s continuous recess which. is provided for a purpose .hereinafter described. in order to festen the sections of the lugs together in operative engagement to form the `anchor., i provide one of seid sections with laterally extending fastening or clamping' lugs 10 twcoi which areormed on one edge-oi' the section neer the upper and lower. ends thereof, while on the opposite edge of said `section midway between the ends thereof is formed e single lug. The lugs 10 are suiiiciently malleable to permit them to be bent around or into engagementpwith the outer side of the cpposing` section of the anchor thereby securely clamping said sections` together to form the anchor.

0n the inner side of the lower ends of the sections arel formed semi-circular flanges 1l which when the sections are brought together forms a continuous annular flange which .provides a seat for a bottom plate or disk `l2 'which is engaged therewith and clamped between the sectionswhen the lat' ter are fastened together.' The plete when thus arranged prevents the sottorete or other materiel from entering the lovver end of the anchor andthus interfering with the proper insertion of the bolt.

In order to forni a bolt hole in the concrete above the anchor sindl to protect the i Which/'has a. diameter corresponding substantizrllly with the die-meter of 'the annular sent or recess 9 formed in the upper endv of theznnchor sind with which said outer or lower member of the ltubes is engaged as shown; The inner or upper member of the casing orlining 13 is adapted to be adjusted in 'the-'lower outer .member to forni 'a casing or lining of the desired length. By thus forming the casing or lining of two/adjustafbly or telescop-ing engaged members it Will be seenv that the length of the casing or Vlining een be readily varied to accordwith the thickness erA depth ci' the 4concrete floor, ceiling or other struc-ture in which the anchors are arranged.- Ey providing the casing or lining 13 it will be seen theta hole will be formed in the upper portion. of the concrete directly in line with the bore orv passage of the anch-or and that the sides or Walls of the hole thus formed will be 'protected by the lining thus preventing particles the. concrete from being. chipped ofi' vand falling into the anchor which would I materially interfere with the insertion of the bolt in the anchor.

From the foregoing description taken in connection-, with the accompanying drawings, the construction and operation oi the invention will be readily understood With'- ont requiring e.' more Aextended explanation.

Various changes inthe torni, proportion, andthe minor detsils of construction may be resorted to Without departing 'from theprinciple or sacrificing any of the advantages of theinvention as claimed.

Heving thus described my invention, what l claim ism v l. A tubular bolt anchor having anlan nular seat' near its upper end, a spiral rib formed on the outside of said anchor, and a bolt casing having' engagement with seid `seat and adapted to form e passage through which the bolt is inserted for engagement with thf anchor. l

2. A Jolt anchorv comprising gnnental interiorly threaded tubular sections having vtherein near theirupper ends semi-circular recesses Which'when the sections are brought Y together forni en annuler seat, ineens to lfesten said' sections together to ferien the an Chor, n.- spirel rib formed on the outer sides of said. sections, and a bolt casing engaged with the seat in the upper end of said sec-V tions and adapted to forni e passage through which the bolt is inserted tor engagement with the anchor. l

3. A bolt anchor for concrete structures comprising' hollow segmental interiorly threaded sections having in their upper ends semi-circular recesses which when the sections :ire brought togctherforin an annular recess, malleable. clamping lugs formed on one of seid sections and adated te be bentaround the. opposing section whereby said sections are fastened together to form the anchor, e bolt casing formed .in tubular telescopiczilljY engaged sections adapted to be engaged with the annular seat in the upperend of seid enchorend to project upwardly' therefrom through the concrete, said sections being adapted to be adljusted to correspond with 'the thickness of 

